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Question

Physics Question on Electric Field

Which is not the unit of electric field?

A

NC\frac{N}{C}

B

N−mC\frac{N-m}{C}

C

Vm\frac{V}{m}

D

JC−m\frac{J}{C-m}

Answer

N−mC\frac{N-m}{C}

Explanation

Solution

The electric field [E] intensity is given by
E=−dVdxE=-\frac{dV}{dx}
Its unit is V/m.
Also, F=qEF=qE
⇒\Rightarrow E=FqE=\frac{F}{q}
Hence, unit of E is NC\frac{N}{C}
Also E=WqxE=\frac{W}{qx}
Hence unit is JC−m\frac{J}{C-m}